Python: Using dictwriter, but setting value types?

I'm just beginning at Python and stackoverflow, forgive me for any mis开发者_StackOverflow中文版takes...

I'm trying to use dictreader and dictwriter for a project of mine. Basically I have a dictionary of songs, which contains many keys (names, artists, play count, song tags for example).

The problem is that when I feed dictwriter into a file, it takes every key and applies the type string to the value.

This isn't a problem for playcount where I can just say int(), but for song tags I have a list of tuples which displays the tag with the amount of times tagged For example: [(Rock, 50), (Roll, 50)].

Now when I read this out of my file, row["tags"] has type string... I don't know how to get it to have the appropriate type.

My sort've silly solution which I haven't tried yet is to search through the string for a (, then a ), and append that to a new list, then do it until I've iterated throughout the tags... But it seems like there should be an easier way...

---

If your CSV consists of the representation of basic Python types then you can use ast.literal_eval() to convert it to Python types.